Portfolio Update

BLACKROCK WORLD MINING TRUST plc
All information is at 31 March 2011 and unaudited.

Performance at month end with net income reinvested
                               One     Three       One     Three      Five
                             Month    Months      Year     Years     Years
Net asset value*              1.3%     -3.6%     25.8%     22.1%    104.4%          
(undiluted)                                                                    
Net asset value*              1.3%     -3.6%     25.8%     23.7%    106.9%          
(diluted)                                                                      
Share price*                  1.2%     -2.7%     27.1%     22.3%     96.4%          
HSBC Global Mining Index      2.3%     -2.9%     18.6%     38.3%    124.0%          

Sources: BlackRock, HSBC Global Mining Index, DataStream

* Net asset value and share price performance includes the warrant
reinvestment, assuming the 2004 and 2006 bonus warrant entitlement per share
was sold and the proceeds reinvested on the first day of trading.


At month end                                                                   
Net asset value:                        Including Income       Capital Only
Undiluted/diluted:                               926.94p #          925.27p
# Includes net revenue of 1.67p                                                
                                                                               
Share price:                                     789.50p                       
Discount to NAV**:                                 14.7%                       
Total assets:                                 £1,694.10m                       
Net yield:                                          0.8%                       
Gearing:                                            3.0%                       

Ordinary shares in issue: 177,537,242                                          
Ordinary shares held in Treasury: 15,474,600                                   

** Discount to NAV based on capital only.                                      


Sector                    % Total   Country Analysis           % Total
                           Assets                               Assets
                                                                               
Diversified                  39.9   Global                        33.9 
Base Metals                  26.8   Latin America                 24.8 
Gold                          9.0   Australasia                   13.4 
Industrial Minerals          10.6   Other Africa                  10.9 
Silver & Diamonds             7.3   South Africa                   7.5 
Platinum                      4.8   USA                            2.2 
Other                         0.6   Canada                         2.0 
Net current assets            1.0   Emerging Europe                1.7 
                            -----   Europe                         1.3 
                            100.0   India                          0.9 
                            =====   Indonesia                      0.2 
                                    Mongolia                       0.2 
                                    Net current assets             1.0 
                                                                 ----- 
                                                                 100.0 
                                                                 ===== 


Ten Largest Investments (in alphabetical order)                                 
                                                                               
Company                                                                        
BHP Billiton                                                                   
First Quantum Minerals                                                         
Freeport McMoRan                                                               
Glencore Finance (Europe) 5% 31/12/14                                          
Impala Platinum                                                                
Minas Buenaventura                                                             
Rio Tinto                                                                      
Soc Min Cerro Verde                                                            
Teck Resources                                                                 
Vale                                                                           


Commenting on the markets, Evy Hambro, representing the Investment Manager
noted:

Performance
The mining market declined sharply at the beginning of the month as ongoing
civil unrest in the Middle East and North Africa and an earthquake off the
coast of Japan resulted in a broad based 'risk-off trade'. As clarity emerged
around the effects of the events in Japan, sentiment improved and the market
began to recover.

Commodity prices were volatile with mixed performance across the commodity
spectrum. Positive returns came from both silver and gold with gains of 13.1%
and 1.6% respectively, as many investors sought refuge in 'safe haven assets'.
Industrial commodity prices were softer through the month on the back of
increasing base metal inventories.

The effects of the Japanese earthquake and struggle to regain control of one of
their largest nuclear facilities led to uncertainty over the future of the
nuclear industry. This resulted in uranium price weakness as government support
for the nuclear market waivered; the uranium price fell by 10.4% and many
uranium equities fell further.

Uncertainty over the forthcoming Peruvian elections negatively impacted the
local currency and stock market with the MSCI Peru Index declining 3.4% (versus
a -0.2% return from the MSCI World Index in Peruvian Neuvo Sol). As a result,
Peruvian mining stocks declined over the month. We are monitoring the outcome
of the election closely.

The iron ore spot price began to regain some ground towards the end of the
month following a sharp drop earlier in the month as demand improved. In spite
of this, Vale (the world's largest iron ore producer) underperformed. This
appears to be due to concerns surrounding increased government influence on
corporate strategy.

M&A continues to be a feature of the mining market; at the start of the month
Equinox Minerals announced a hostile bid for Lundin Mining valuing the equity
at US$8.10 per share, a 26% premium to the Lundin closing price on 25 February.

Strategy/Outlook
Our outlook for the mining sector continues to be positive in 2011. Drivers
include robust demand from emerging markets accompanied by improving demand in
developed economies and constrained supply in select commodities.

Many of the company results recently posted have offered evidence of the high
volumes of free cashflow mining companies are able to generate at these
commodity prices. We have, as a result, seen more M&A in the sector in 2011, as
demonstrated by recent activity: Minmetals CAD$6.3bn intention to bid for
Equinox Minerals (which may scupper a hostile takeover of Lundin Mining by
Equinox) as well as Vale's approach to buy Democratic Republic of Congo
focussed Metorex. We have also seen strong examples of companies reinvesting
cash into growth opportunities and returning capital to shareholders through
dividends and share buy backs. We expect to see these trends continue.

18 April 2011

ENDS

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any website accessible from hyperlinks on the Manager's website (or any other
website) is incorporated into, or forms part of, this announcement.